On Monday, the hospital warned that the posters had caused “a lot of upset and distress for patients, many of whom attend the hospital for a number of different reasons and not just for the happy occasion of giving birth to a new baby.”

After the posters were re-erected last night, a group calling themselves "Radical Queers Resist" decided to take action.

They said the images, which show foetuses at various stages of development, are distressing to women – and covered them up with LGBT pride flags.

We won’t back down until they do. Images are being blocked, pride flags are on their way. Stay safe everyone, avoid this area if you need to! - N pic.twitter.com/IPMGZfo6e8

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